The ability triggers whenever any player (including you) casts a spell of any type.
Nether Void
This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.
This is not an additional cost, it is a triggered ability.
This printing is one of 3 catalogued treatments from ME3 — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
This card belongs to *Masters Edition III* (released September 2009).
Card #73 in Masters Edition III.
Rarity tier: rare. Rares occupy the bottom-of-pack rare slot in standard boosters.
Card type: World Enchantment. Color identity: black. Mana cost: {3}{B} (4 converted).
Legal in Duel, Predh, Legacy, Vintage, Commander, and Oathbreaker. This printing is on Wizards of the Coast's Reserved List — Wizards has committed never to reprint cards on that list, which underwrites a structural scarcity floor on every surviving copy.
EDHrec ranks this card #15,812 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Harold McNeill.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Harold McNeill
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
